Numerous governments across Central and Eastern Europe are taking steps to conserve electricity and avert an energy crisis as record low water levels on the Danube River have forced power plants to the brink of shutting down.

Persistent drought and successive extreme heat waves have deprived one of Europe's largest rivers of water, pushing the Danube's levels in Hungary's capital Budapest to around 10 centimeters (4 inches) on Monday, well below the previous all-time low of 33 centimeters (13 inches) set in 2018.

Climate change's fingerprints are all over the extreme fire weather that sparked this week's devastating wildfires in Spain and France and has spiked Southern Europe's burning the past eight years, two new studies conclude.

Human-caused climate change made the hot and dry conditions responsible for Spain's record-sized inferno 20 times more likely to happen, and it doubled the chances of extreme fire conditions for the flames in France, scientists at World Weather Attribution calculated in a rapid analysis Thursday, conducted while fires were still burning. Warming in the past 26 years has tripled the odds of the severe fire risk conditions in Spain and increased the chances in France 40%, the same report found.

Keepers at Prague Zoo used tons of ice on Thursday to give its animals some much-needed relief as yet another heat wave hit Europe.

Polar bears Aleut and Gregor wasted no time and were rolling in the beds of ice cubes after entering their outside enclosure.

From his vineyards in Bordeaux wine country, Edouard le Grix de la Salle can sometimes smell the burning forests far away. The smoke brings a whiff of hardship for the region's economic fortunes.

Wildfires that have burned an area four times the size of Paris and driven 220,000 people from homes and some of the region's tourist attractions promise to sting France's already squeezed economy.

The Mediterranean of our ancestors is no more.

Scientists say climate change, caused mainly by burning oil, coal and gas, is making the Mediterranean Sea hotter, bringing hundreds of new and invasive fish species that decimate indigenous populations.

As wildfires rage in France and Spain and a renewed heat wave is bearing down on Western Europe, a prolonged drought half a continent away is setting record low water levels on one of Europe's largest rivers, disrupting tourism and industry and confronting residents with the realities of climate change.

The Danube River, which runs through 10 countries from southwestern Germany to the Black Sea, has receded to never-before-seen lows along much of its course, exposing rocks, sand bars and old shipwrecks that have rarely been seen before.

French authorities gave the go-ahead Thursday for 84,000 evacuees forced out by a monster wildfire to go back to their homes in southwest France, the strongest sign yet that firefighters are turning a corner in their battle against the flames that have burned an area four times the size of Paris.

The authorized returns announced Thursday covered nine localities that had been evacuated. In all, more than 220,000 people were forced to flee their homes since last week.

It seems as if the world is afire this summer. But even as wildfires in Europe and North America grow more extreme, key worldwide burning statistics are at a record low largely because Africa and Asia are controlling fire more.

Experts say these seemingly opposite trends are happening at the same time because of what humanity is doing to the planet.

Fire crews battled a mega-fire four times the size of Paris in southwest France while facing tinderbox temperatures forecast to climb above 40 degrees Celsius (104 degrees Fahrenheit) on Wednesday.

The heat wave and forecast winds could hamper progress against the blaze that has forced 220,000 people from their homes, authorities for the Gironde region around Bordeaux said.

Spanish firefighter Javier García has never faced anything like the record blaze raging near Madrid in his two decades protecting woodlands and rural communities.

"This doesn't have a precedent," García told The Associated Press by phone before another long day ahead.